C# CompressionType类代码示例

        public static byte[] CompressBytes(CompressionType type, byte[] fileBytes)
        {
            MemoryStream ms = new MemoryStream();
            Stream compressedStream = null;

            if (type == CompressionType.deflate)
            {
                compressedStream = new DeflateStream(ms, CompressionMode.Compress, true);
            }
            else if (type == CompressionType.gzip)
            {
                compressedStream = new GZipStream(ms, CompressionMode.Compress, true);
            }

            if (type != CompressionType.none)
            {
                //write the bytes to the compressed stream
                compressedStream.Write(fileBytes, 0, fileBytes.Length);
                compressedStream.Close();
                byte[] output = ms.ToArray();
                ms.Close();
                return output;
            }

            //not compressed
            return fileBytes;
        }

 private static void SetMaxSize(CompressionType compression, ImporterSettings settings)
 {
     switch (compression)
     {
         case CompressionType.Dxt:
         case CompressionType.Dxt1:
         case CompressionType.Dxt5:
         case CompressionType.ShelfHeroshot:
         case CompressionType.ShelfHeroshotBlackWhite:
             settings.MaxSize = 1024;
             break;
         case CompressionType.Dxt_2K:
         case CompressionType.Dxt1_2K:
         case CompressionType.Dxt5_2K:
         case CompressionType.NoesisLifestyleFeatures:
         case CompressionType.FilterTest:
             settings.MaxSize = 1024*2;
             break;
         case CompressionType.Thumbnail140:
         case CompressionType.Thumbnail256:
             settings.MaxSize = 256;
             break;
         default:
             settings.MaxSize = 1024*2;
             break;
     }
 }

        public void RequestImage(ImageType img_type, CompressionType comp_type = CompressionType.LZ4)
        {
            byte[] send_params = new byte[2];

            switch (comp_type)
            {
                case CompressionType.Uncompressed:
                    send_params[0] = COMPR_TYPE_NONE;
                    break;
                case CompressionType.LZ4:
                    send_params[0] = COMPR_TYPE_LZ4;
                    break;
                default:
                    break;
            }

            switch (img_type)
            {
                case ImageType.Depth:
                    send_params[1] = IMG_TYPE_DEPTH;
                    break;
                case ImageType.Image:
                    send_params[1] = IMG_TYPE_IMAGE;
                    break;
                case ImageType.IR:
                    send_params[1] = IMG_TYPE_IR;
                    break;
                default:
                    break;
            }

            sock.Send(send_params);

            buf = sock.Recv();

            switch (comp_type)
            {
                case CompressionType.Uncompressed:
                    buf.CopyTo(decompressed, 0);
                    break;
                case CompressionType.LZ4:
                    dcmp.DecompressKnownSize(buf, decompressed, 640 * 480 * (img_type == ImageType.Depth ? depth_bpp : (img_type == ImageType.Image ? image_bpp : ir_bpp)));
                    break;
                default:
                    break;
            }

            bmp_d = bmp.LockBits(new Rectangle(0, 0, 640, 480), ImageLockMode.WriteOnly,
                (img_type == ImageType.Depth ? PixelFormat.Format16bppRgb555 : (img_type == ImageType.Image ? PixelFormat.Format24bppRgb : PixelFormat.Format8bppIndexed)));

            // http://msdn.microsoft.com/en-us/library/system.drawing.imaging.bitmapdata.aspx

            IntPtr ptr = bmp_d.Scan0;
            // Copy the RGB values back to the bitmap
            System.Runtime.InteropServices.Marshal.Copy(decompressed, 0, ptr, bmp_d.Width * bmp_d.Height * (img_type == ImageType.Depth ? depth_bpp : (img_type == ImageType.Image ? image_bpp : ir_bpp))); // elvileg mindenképp 640x480x2, fixme

            // Unlock the bits.
            bmp.UnlockBits(bmp_d);
            // elvileg ez a leggyorsabb mód a másolásra, ennél gyorsabban nem lehet...
        }

 internal ZipEntry(Stream fileStream, string entryName, CompressionType compressionType)
     : this(entryName, compressionType)
 {
     if (!fileStream.CanRead) throw new IOException("Can not read from file stream");
     _fileStream = fileStream;
     IsDirty = true;
 }

 /// <summary>
 /// Constructor
 /// </summary>
 /// <param name="StreamUsing">The stream for the page</param>
 /// <param name="Compression">The compression we're using (gzip or deflate)</param>
 /// <param name="Type">Minification type to use (defaults to HTML)</param>
 public UglyStream(Stream StreamUsing, CompressionType Compression, MinificationType Type = MinificationType.HTML)
     : base()
 {
     this.Compression = Compression;
     this.StreamUsing = StreamUsing;
     this.Type = Type;
 }

    void NetworkUpdateWorld(byte[] data)
    {
        World world = (World)FindObjectOfType(typeof(World));
        world.loadDefaultWorld();

        string size = "";
        CompressionType compression;

        using (MemoryStream stream = new MemoryStream(data))
        {
            using (WorldInputStream reader = new WorldInputStream(stream))
         			{
                reader.Read(world);

                size = stream.Length.GetSizeReadable();
                compression = reader.compressionType;
            }
        }

        UnityEngine.Debug.Log("world received (" + size + " | " + compression + ")");

        GameObject player = GameObject.FindWithTag("Player");
        if (player)
            player.SendMessage("Respawn");

        CircularObjectPool.instance.RecallAllObjectsForType("Debris");
    }

        // File : Create new, Append to existing, Raz existing
        // ArchiveType : Rar = 0, Zip = 1, Tar = 2, SevenZip = 3, GZip = 4
        // CompressionType : None = 0, GZip = 1, BZip2 = 2, PPMd = 3, Deflate = 4, Rar = 5, LZMA = 6, BCJ = 7, BCJ2 = 8, Unknown = 9,
        // Zip compression type : BZip2
        // GZip compression type : GZip
        // example from https://github.com/adamhathcock/sharpcompress/wiki/API-Examples
        // this example dont work to add file to an existing zip
        public static void Test_Compress(string compressFile, IEnumerable<string> files, string baseDirectory = null, ArchiveType archiveType = ArchiveType.Zip,
            CompressionType compressionType = CompressionType.BZip2, CompressionLevel compressionLevel = CompressionLevel.Default)
        {
            //FileOption
            if (baseDirectory != null && !baseDirectory.EndsWith("\\"))
                baseDirectory = baseDirectory + "\\";
            CompressionInfo compressionInfo = new CompressionInfo();
            compressionInfo.DeflateCompressionLevel = compressionLevel;
            compressionInfo.Type = compressionType;

            //Trace.WriteLine("SharpCompressManager : DeflateCompressionLevel {0}", compressionInfo.DeflateCompressionLevel);
            //Trace.WriteLine("SharpCompressManager : CompressionType {0}", compressionInfo.Type);

            Trace.WriteLine($"open compressed file \"{compressFile}\"");
            // File.OpenWrite ==> OpenOrCreate
            using (FileStream stream = File.OpenWrite(compressFile))
            using (IWriter writer = WriterFactory.Open(stream, archiveType, compressionInfo))
            //using (IWriter writer = WriterFactory.Open(stream, archiveType, CompressionType.BZip2))
            {
                foreach (string file in files)
                {
                    string entryPath;
                    if (baseDirectory != null && file.StartsWith(baseDirectory))
                        entryPath = file.Substring(baseDirectory.Length);
                    else
                        entryPath = zPath.GetFileName(file);
                    Trace.WriteLine($"add file \"{entryPath}\"  \"{file}\"");
                    writer.Write(entryPath, file);
                }
            }
        }

        protected void ArchiveStreamReadExtractAll(IEnumerable<string> testArchives, CompressionType compression)
        {
            foreach (var path in testArchives)
            {
                ResetScratch();
                using (Stream stream = File.OpenRead(path))
                using (var archive = ArchiveFactory.Open(stream))
                {
                    Assert.IsTrue(archive.IsSolid);
                    using (var reader = archive.ExtractAllEntries())
                    {
                        ReaderTests.UseReader(this, reader, compression);
                    }
                    VerifyFiles();

                    if (archive.Entries.First().CompressionType == CompressionType.Rar)
                    {
                        return;
                    }
                    foreach (var entry in archive.Entries.Where(entry => !entry.IsDirectory))
                    {
                        entry.WriteToDirectory(SCRATCH_FILES_PATH,
                                               ExtractOptions.ExtractFullPath | ExtractOptions.Overwrite);
                    }
                }
                VerifyFiles();
            }
        }

        public static RawData ImaqFlatten(Image image, FlattenType type, CompressionType compression, int quality)
        {
            uint size = 0;
            IntPtr rv = Interop.imaqFlatten(image.NativeObj, type, compression, quality, ref size);

            return new RawData(rv, size, true);
        }

 private static byte[] UnCompress(this byte[] bytes, CompressionType type)
 {
     if (bytes == null || bytes.Length == 0)
         return new byte[0];
     using (var stream = type == CompressionType.GZip
         ? (Stream)new GZipStream(new MemoryStream(bytes), CompressionMode.Decompress)
         : new DeflateStream(new MemoryStream(bytes), CompressionMode.Decompress))
     {
         var buffer = new byte[4096];
         using (var memory = new MemoryStream())
         {
             int count;
             do
             {
                 count = stream.Read(buffer, 0, buffer.Length);
                 if (count > 0)
                 {
                     memory.Write(buffer, 0, count);
                 }
             }
             while (count > 0);
             bytes = memory.ToArray();
         }
     }
     return bytes;
 }

 public static IWriter Open(Stream stream, ArchiveType archiveType, CompressionType compressionType, bool leaveOpen = false)
 {
     return Open(stream, archiveType, new CompressionInfo
                                          {
                                              Type = compressionType
                                          }, leaveOpen);
 }

 public static IWriter Open(Stream stream, ArchiveType archiveType, CompressionType compressionType)
 {
    return Open(stream, archiveType, new CompressionInfo
                                     {
                                        Type = compressionType
                                     });
 }

        public static async Task<Stream> CompressAsync(CompressionType type, Stream original)
        {            
            using (var ms = new MemoryStream())
            {
                Stream compressedStream = null;

                if (type == CompressionType.deflate)
                {
                    compressedStream = new DeflateStream(ms, CompressionMode.Compress);
                }
                else if (type == CompressionType.gzip)
                {
                    compressedStream = new GZipStream(ms, CompressionMode.Compress);
                }

                if (type != CompressionType.none)
                {
                    using (compressedStream)
                    {
                        await original.CopyToAsync(compressedStream);
                    }

                    //NOTE: If we just try to return the ms instance, it will simply not work
                    // a new stream needs to be returned that contains the compressed bytes.
                    // I've tried every combo and this appears to be the only thing that works.

                    byte[] output = ms.ToArray();
                    return new MemoryStream(ms.ToArray());
                }

                //not compressed
                return original;
            }
        }

 public void Close()
 {
     if (Map != null) { Map.Dispose(); Map = null; }
     Address = null;
     Length = 0;
     Compression = CompressionType.None;
 }

 public static byte[] Decompress(string file, CompressionType cmp)
 {
     byte[] ret = new byte[0];
     switch (cmp)
     {
         case CompressionType.Uncompressed:
             ret = File.ReadAllBytes(file);
             break;
         case CompressionType.Kosinski:
             ret = Kosinski.Decompress(file);
             break;
         case CompressionType.KosinskiM:
             ret = ModuledKosinski.Decompress(file, LevelData.littleendian ? Endianness.LittleEndian : Endianness.BigEndian);
             break;
         case CompressionType.Nemesis:
             ret = Nemesis.Decompress(file);
             break;
         case CompressionType.Enigma:
             ret = Enigma.Decompress(file, LevelData.littleendian ? Endianness.LittleEndian : Endianness.BigEndian);
             break;
         case CompressionType.SZDD:
             ret = SZDDComp.SZDDComp.Decompress(file);
             break;
         default:
             break;
     }
     return ret;
 }